Fifth wheel coupler

Claim 1

IN A TRACTOR FOR HAULING SEMI TRAILERS, A FIFTH WHEEL COUPLER COMPRISING A SUPPORT, FORE AND AFT DOWNWARDLY INCLINED LINKS HINGED AT THEIR LOWER ENDS TO THE SUPPORT AND CONVERING TOWARD A HORIZONTAL AXIS BENEATH THE SUPPORT AND CROSSWISE OF THE TRACTOR, A COUPLER PLATE, MEANS FOR CONNECTING THE PLATE TO THE UPPER ENDS OF THE FORE AND AFT LINKS, A RAMP PIVOTED AT ITS FORWARD END ON THE BACK OF THE COUPLER PLATE AND EXTENDING REARWARD FROM THE COUPLER PLATE AND BIASED DOWNWARD TO A LOADING POSITION FOR GUIDING THE NOSE OF A TRAILER UP ONTO THE COUPLER PLATE, A LIFTER FOR THE RAMP HAVING A PART PROJECTING ABOVE THE COUPLER PLATE IN THE LOADING POSITION OF THE RAMP, SAID PART BEING IN A POSITION TO BE DEPRESSED BY THE NOSE OF A TRAILER AS IT RIDES UP ONTO THE COUPLER PLATE AND TO BE HELD DEPRESSED WHILE THE NOSE OF THE TRAILER IS SEATED ON SAID COUPLER PLATE, AND A CONNECTION BETWEEN THE LIFTER AND THE RAMP FOR LIFTING THE RAMP ABOVE SAID LOADING POSITION AS SAID PART IS DEPRESSED.